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FT-339C > Fuel System > Flashcards

Fuel System Flashcards

1
Q

Where pylons can be installed?

A

2, 5

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2
Q

The booster pump is housed in

A

The flight sump

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3
Q

The flight sump contains fuel for

A

20 to 23 sec neg g at max throttle

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4
Q

FUEL SHUT-OFF VALVE is powered by

A

Essential bus

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5
Q

How long does it take to dump fuel?

A

2 min for 3/4
6 min for 1/4

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6
Q

Fuel dump allows to dump fuel contained in

A

Tip tanks

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7
Q

FUEL DUMP system is alimented by

A

Essential bus

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8
Q

Fuel qty is collected by sensors in the tanks and is sent to

A

EDAB for showing on MFDs

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9
Q

When fuel qty goes below the selected bingo, what happens in the cockpit?

A

Fuel warning audio message
MASTER CAUTION light
In SYS format, the fuel is displayed in amber background

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10
Q

F. TRANS turns on when

A

Fuel qty in fuselage tank is 500 +30/-20kg, w/ at least 45kg in tip tanks

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11
Q

F. LOW turns on when

A

Fuselage tank below 210+-20kg (F34)

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12
Q

Fuel used for 339CD is

A

NATO F-34

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13
Q

F. UNBAL turns on when

A

60kg for 12 sec

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14
Q

The error in fuel measurement from sensors is

A

+-15kg and 2% of the indication

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15
Q

The unusable fuel in tip tanks is

A

10kg

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16
Q

Minimum fuel qty in each tip tank is

A

10kg (they are considered empty)

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17
Q

Nominal density F-34

A

0.803 kg/dm3

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18
Q

Name of the Air refueling nozzle

A

MA-2 standard

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19
Q

How many inlet valves are there in the fuel system?

A

3

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20
Q

How many vent/safety valves are there?

A

1

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21
Q

How valves are open/close during air to air refueling?

A

By pushing the AR/ON/FAIL push button they are open
They close automatically as the selected qty of fuel is reached

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22
Q

When does the probe nozzle valve open?

A

At the contact w/ basket, allowing fuel to flow

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23
Q

FAIL light in refueling system comes on when

A

1 of the 3 Inlet valves, or the vent/safety valve stay closed instead of opening

24
Q

During air to air refuel operation, how do we understand that the selected qty has been reached?

A

ON light goes off (inlet valves and vent safety valve automatically close)

25
Q

F.VENT comes on when

A

Fuel vent/safety valve fails to close when the operation is over

26
Q

If after air refueling ON light stays on it means that

A

1 of the 3 inlet valves failed to close

27
Q

What switch does activate Booster pump?

A

ENG/MSTR moved to ON

28
Q

At what qty in the fuselage tank transfer valves open sending fuel to it from tips/pylons?

A

590kg

29
Q

When tips are empty, how does the system maintain positive pressure in the fuselage tank?

A

W/ pressurized air flowing from empty tips to fuselage

30
Q

Name the caution lights of the fuel system

A

F. UNBAL
F. LOW
F. VENT
F. PRSS
F. TRANS

31
Q

When caution legend of fuel system comes on an audio “FUEL WARNING” is heard in the headset, except for what light?

A

F. VENT

32
Q

Inverted Flight Sump capacity

A

14 l

33
Q

Booster pump sends fuel to the engine feeding system at a pressure of

A

18psi

34
Q

What is the pressure of the air used to cause fuel transfer?

A

4.5psi

35
Q

In what case moving the FUEL TRANSFER SWITCH from pyl to tip does not produce any effect?

A

In case of batteries failure, or selecting BAT SWITCH to EMERG

36
Q

Unusable fuel in fuselage tank

A

100kg

37
Q

Once F. PRSS illuminates

A

It means that Booster pump is not working properly, therefore the engine driven pump ensures functionality of the engine for only 15’ at max power

38
Q

Single point refueling pressure range

A

30-50psi

39
Q

Fuselage tank qty

A

626kg

40
Q

Wing tip tanks qty

A

803kg

41
Q

Pylons qty

A

530kg

42
Q

Max amount of fuel without pylons

A

1429kg

43
Q

Max amount of fuel with pylons

A

1959kg

44
Q

Fuel from the booster pump, before reaching the supply system flows into

A

Anular filter

45
Q

When pylons are empty, what other light comes on warning us to move the transfer switch?

A

MASTER CAUTION

46
Q

The fuel measuring system in the pylons

A

Doesn’t provide w/ qty but only if empty

47
Q

When fuel is below bingo, bingo qty will appear

A

Below total fuel qty and the total fuel will turn in amber background on the MFD sys format

48
Q

Considerations when F. VENT comes on

A

Do not do aggressive maneuvers
Fuel transfer from the tips might not be working properly

49
Q

During refueling the fuel flows

A

From the fuselage tank to the tip tanks

50
Q

For operating the refuel system on ground

A

Battery must be on

51
Q

Green lights in the Fuel Control Panel indicate that

A

The fuselage inlet valve and safety/ vent valve are open

52
Q

How can be understood from the Fuel Control Panel when we reached the desired qty of fuel in that tank?

A

Because the respective red light on the panel goes off

53
Q

What does the Fuel Control Box do?

A

Used mainly for refueling ops.

Receives inputs from:
- A/R switch
- Refueling Control Panel

for opening and closing of 3 inlet valves and vent/safety valve

Turns on AR/ON/FAIL lights on the glareshield

Communicates with EDAB

54
Q

In the fuel system, pressure coming from air bled in the 8th stage of the compressor, is reduced to 4.5psi from

A

Pressure Reducing Valve

55
Q

During A/A refueling, after how many kg above bingo the amber background caused by BINGO fuel will go out?

A

50kg

FT-339C (12 decks)

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